BenchReference / Drill sizes / 4.7 mm 4.7 mm Drill Decimal inches 0.1850″
Millimeters 4.7 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 3/16″ 0.1875″ / 4.762 mm +0.062 mm (+0.0025″)
Number (wire gauge) #13 0.1850″ / 4.699 mm −0.001 mm (−0.0000″)
Letter A 0.2340″ / 5.944 mm +1.244 mm (+0.0490″)
−0.376 mm +0.376 mm 4.7 mm 4.5 mm −0.2 mm 4.6 mm −0.1 mm 4.8 mm +0.1 mm 4.9 mm +0.2 mm #13 −0.001 mm 3/16″ +0.062 mm A +1.244 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.38 mm
Positive difference = cuts a slightly larger hole than 4.7 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 4.7 mm 4.5 mm 0.1772 4.5 −0.2 mm 4.6 mm 0.1811 4.6 −0.1 mm 4.7 mm 0.1850 4.7 — 4.8 mm 0.1890 4.8 +0.1 mm 4.9 mm 0.1929 4.9 +0.2 mm
← 4.6 mm (smaller) 4.8 mm (larger) →
Compare 4.7 mm with another size
Data provenance. ASME B94.11M, Twist Drills (standard drill size series) (ASME). Millimeter and inch values are converted with the exact definition 1 in = 25.4 mm; the canonical dimension for this metric size is 4.7 mm. See all data sources .